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CassiusDelaney

  • 2 years ago

one sec ill post a pic of the thingy :)

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  1. CassiusDelaney
    • 2 years ago
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    here it is :)

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  2. rctnk99
    • 2 years ago
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    The dartboard or the discounts?

  3. CassiusDelaney
    • 2 years ago
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    Dart board that ones next ;)

  4. rctnk99
    • 2 years ago
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    Ok, a probability question. You have 4 darts and 3 possible values. It's a combination since the order of the darts doesn't matter.

  5. CassiusDelaney
    • 2 years ago
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    so the values are 1,5,9 5,9,1 and 9,1,5?

  6. rctnk99
    • 2 years ago
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    Ah, sorry, it's a permutation.

  7. CassiusDelaney
    • 2 years ago
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    oh ok

  8. rctnk99
    • 2 years ago
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    The formula for a permutation is n! over (n-r)!

  9. rctnk99
    • 2 years ago
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    n is 4, r is 3

  10. CassiusDelaney
    • 2 years ago
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    so 1

  11. rctnk99
    • 2 years ago
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    Do you know factorial notation?

  12. CassiusDelaney
    • 2 years ago
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    nope :/

  13. rctnk99
    • 2 years ago
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    Factorial is multiplying a number, then multiplying by one less, and it continues down to 1. So 4! is 4*3*2*1, and 1! is 1. 4*3*2*1 also happens to be your answer.

  14. CassiusDelaney
    • 2 years ago
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    what does the * mean?

  15. rctnk99
    • 2 years ago
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    Multiply

  16. CassiusDelaney
    • 2 years ago
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    so 24?

  17. rctnk99
    • 2 years ago
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    That's it.

  18. CassiusDelaney
    • 2 years ago
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    thanks buddy :)

  19. rctnk99
    • 2 years ago
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    While it's open, might as well solve the other one too.

  20. CassiusDelaney
    • 2 years ago
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    oh yeah thanks :)

  21. rctnk99
    • 2 years ago
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    Imagine you start at 100 dollars. What's 10 percent off of that?

  22. CassiusDelaney
    • 2 years ago
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    10...

  23. rctnk99
    • 2 years ago
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    So 100-10 is 90. What is 20 percent of 90?

  24. CassiusDelaney
    • 2 years ago
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    18?

  25. rctnk99
    • 2 years ago
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    Yep. 90-18 is 72. So 100-72 is your total discount.

  26. rctnk99
    • 2 years ago
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    Or 28%, to be exact.

  27. CassiusDelaney
    • 2 years ago
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    oh ok thanks

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